SEWING MACHINE DIV.20 MODEL 385. 17822490
MECHANICAL ADJUSTMENT
MOTOR BELTTENSION
TO CHECK:
I. IFTHE MOTOR BELTTENSION ISTOO TIGHT OR TOO LOOSE, ITMAY CAUSE BELTNOISE.
ALSO. A TOO TIGHT BELTTENSION CAN CAUSE THE MACHINE TO RUN SLOW AND WILL
OVERLOAD THE MOTOR.
TOO LOOSE A MOTOR BELT TENSION, HOWEVER, MAY CAUSE THE BELTTEETH ON THE
MOTOR PULLEY TO JUMP.
2. THE CORRECT MOTOR BELTTENSION ISWHEN THE BELTPUSHES INABOUT 7MM (0.28")-
9MM (0.36")UNDER A PRESSURE OF ABOUT 300 GRAMS.
ADJUSTMENT PROCEDURE:
1. REMOVE THE BELTCOVER.
2. LOOSEN SCREWS (A) AND (B).
3. MOVE THE MOTOR UP OR DOWN TO ADJUST THE DEFLECTION TO ABOUT 7MM (0.28") -
9MM (0.36").
4. TIGHTEN SCREWS (A) AND (B).
_ 300g LOAD
DEFLECTION 7-9MM
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